Similar to how we do it for _PATH / _SYSROOT_DIR. Buildroot gets fairly
confused if the user has set up a custom PKG_CONFIG_LIBDIR, so ensure
it gets unset.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
# Make sure pkg-config doesn't look outside the buildroot tree
unexport PKG_CONFIG_PATH
unexport PKG_CONFIG_SYSROOT_DIR
+unexport PKG_CONFIG_LIBDIR
# Having DESTDIR set in the environment confuses the installation
# steps of some packages.